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MDEV-7856: EXPLAIN FORMAT=JSON should show partitions

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Oleksandr Byelkin
2015-04-08 10:13:36 +02:00
parent abba4184e6
commit 697194461a
9 changed files with 152 additions and 40 deletions
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83
mysql-test/r/explain_json_format_partitions.result Normal file
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@@ -0,0 +1,83 @@
create table t2(a int);
insert into t2 values (0),(1),(2),(3),(4),(5),(6),(7),(8),(9);
create table t1 (
a int not null
) partition by key(a);
insert into t1 select a from t2;
explain partitions select * from t1 where a in (2,3,4);
id select_type table partitions type possible_keys key key_len ref rows Extra
1 SIMPLE t1 p0 ALL NULL NULL NULL NULL 10 Using where
explain format=json select * from t1 where a in (2,3,4);
EXPLAIN
{
"query_block": {
"select_id": 1,
"table": {
"table_name": "t1",
"partitions": ["p0"],
"access_type": "ALL",
"rows": 10,
"filtered": 100,
"attached_condition": "(t1.a in (2,3,4))"
}
}
}
analyze format=json select * from t1 where a in (2,3,4);
ANALYZE
{
"query_block": {
"select_id": 1,
"r_loops": 1,
"r_total_time_ms": "REPLACED",
"table": {
"table_name": "t1",
"partitions": ["p0"],
"access_type": "ALL",
"r_loops": 1,
"rows": 10,
"r_rows": 10,
"r_total_time_ms": "REPLACED",
"filtered": 100,
"r_filtered": 30,
"attached_condition": "(t1.a in (2,3,4))"
}
}
}
analyze format=json update t1 set a=a+10 where a in (2,3,4);
ANALYZE
{
"query_block": {
"select_id": 1,
"table": {
"update": 1,
"table_name": "t1",
"partitions": ["p0"],
"access_type": "ALL",
"rows": 10,
"r_rows": 3,
"r_filtered": 100,
"using_io_buffer": 1,
"r_total_time_ms": "REPLACED",
"attached_condition": "(t1.a in (2,3,4))"
}
}
}
analyze format=json delete from t1 where a in (20,30,40);
ANALYZE
{
"query_block": {
"select_id": 1,
"table": {
"delete": 1,
"table_name": "t1",
"partitions": ["p0"],
"access_type": "ALL",
"rows": 10,
"r_rows": 10,
"r_filtered": 0,
"r_total_time_ms": "REPLACED",
"attached_condition": "(t1.a in (20,30,40))"
}
}
}
drop table t1,t2;